{"thcode":23,"term":{"code":22,"name":"Bathymetry and Elevation","parent":20,"scope":"Includes measures of the height of a location above or below a reference surface. Bathymetry is the elevation of the Earth's surface beneath a body of water, especially the ocean, typically determined by measurements of depth from the water surface at mean lower low water. Distributions are topographic maps and bathymetric charts based on collected data and also include smoothed or gridded maps of bathymetry and elevation from observational data or other associated factors. Assessment data types include models of ecological value, economic value, or current rates of alterations due to erosion, accretion, climate change, and other stressors (for example, wetland habitat loss). Predictions are the results of models or projections of future distributions, values, or ecological impacts of bathymetry, including predicted changes due to natural and human forces such as erosion, deposition, sea-level rise, and dredging activities; predictions also include the results of scenario-based models of bathymetry changes under different management strategies."},"uf":[],"bt":[{"code":20,"name":"Physical\/Chemical Features","parent":7,"scope":"Geological, chemical, or hydrodynamic features that are ecologically important or influence patterns of human uses of the ocean. Examples include seamounts, persistent upwelling zones, areas of low dissolved oxygen, and areas of reduced pH. Distributions are recorded observations of parameters and features, often as a function of time as well as place, also including maps and three-dimensional predictions of distributions based on combinations of observations and theory. Distributions of physical and chemical features (for example, physical habitat, substrate, or bathymetry) are often used as data to support habitat-biota models. Assessments provide information about the value, impact, drivers, connections, or functions of a feature in its present distributions, or they evaluate the effects of physical\/chemical features on ecology or suitability for use. Assessments can include climate change models that project environmental effects of climate change and acidification. Larger assessments that combine physical\/chemical features with other Resources and Uses categories can appropriately be included here and also in the other related Resources or Uses categories. Predictions are the results of models or projections of future distributions, values, or impacts, which include anticipated changes produced by natural and human processes, and they are also the results of scenario-testing models for comparing outcomes of different management actions."},{"code":7,"name":"Nonliving Resources","parent":6,"scope":"Data are about chemical, physical, or geological features that are of use or importance to humans or ecologies."},{"code":6,"name":"Data Content Subjects","parent":1,"scope":"Environmental characteristics and processes as well as human activities that use, rely on, or impact those features."},{"code":1,"name":"Data Categories for Marine Planning","parent":null,"scope":"Categories indicating the breadth of information types required for ocean planning from a national, multidisciplinary perspective. Published in USGS Open-File Report 2015-1046, doi:10.3133\/ofr20151046"}],"nt":[],"rt":[]}